All vulnerabilities
CVE-2026-101292

Artemis-core-client: unsafe reflection in apache activemq artemis federation message deserialization

Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25Operating systems
Open in ThreatlineRecord JSON
CVSS
8.2High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.43%Chance of exploitation activity in the next 30 days, higher than 36% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published28 Sep 2026Updated 20 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

Apache ActiveMQ Artemis before 2.34.0 contains an unsafe reflection vulnerability in FederationStreamConnectMessage.getFederationPolicy(). The method calls Class.forName(clazz).getConstructor().newInstance() where clazz is read directly from the CORE protocol wire buffer without type validation. An authenticated federation peer can send a FEDERATION_DOWNSTREAM_CONNECT packet with a crafted class name, causing the broker to load and instantiate arbitrary classes visible to the Artemis module classloader. Static initializers (<clinit>) and no-argument constructors (<init>()) execute as side effects before the type cast, enabling denial of service via system-property poisoning, out-of-memory conditions via classloading, or broker state manipulation.

Text from CVE List

Affected versions 11

  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.16.0-22.redhat_00057.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.3.14-11.SP11_redhat_00001.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:1.5.26-2.Final_redhat_00001.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.18.8-1.redhat_00003.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:5.0.31-3.SP2_redhat_00001.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:1.10.0-46.Final_redhat_00044.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:4.1.135-1.Final_redhat_00001.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.5.5-30.SP12_redhat_00020.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.5.5-24.SP12_redhat_00016.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:2.2.40-2.SP3_redhat_00001.1.el7eap and laterCVE List
  • Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7unaffected: 0:7.4.25-2.GA_redhat_00001.1.el7eap and laterCVE List

References 4